In the suppression of surges in low voltage power lines the over-voltage protection measures and the electromagnetic capability ( EMC) of the electronic devices should be considered. 电源线中浪涌抑制需要从过电压保护和电磁兼容两方面考虑。
Analysis and improvement of SEL-749M low voltage protection malfunction SEL-749M低电压保护误动作的分析与改进
Integration Principle Based Traction Transformer Low Voltage Side Over-voltage Protection 基于集成原理的牵引变压器低压侧过电流保护
In the process of running, the governor has the function of over-current protect, low voltage protection, output short-voltage protection and soft start. 本调速器具有运行时的过流保护、低压保护、输出短路保护和软起动功能。
Against output short-circuit, Over voltage, Low voltage, Low battery voltage, Surge protection, loss phase protection. 输出短路保护,过压保护,低压保护,低电池电压,浪涌电压保护,相序亏损保护。
Analysis of Low Voltage Motor Protection 低压电动机保护装置的分析
The Arc-Fault Circuit Interrupter& A New Low Voltage Protection Apparatus 低压电弧故障断路器&一种新型低压保护电器
DSP chips have the advantages of high speed performance and very flexible instruction set. It can realize complicated algorithm that using the DSP in the design of middle and low voltage transmission line protection equipment. 由于DSP芯片运算速度快,代码执行效率高,因此在中低压线路保护装置设计中采用DSP芯片进行设计,可以实现很复杂的保护算法。
In fact, as far as hardware is concerned, it pay more attention to isolation of signal, drive circuit, protection of low voltage of battery and protection of current overload of circuit ( including main circuit and motor circuit) etc. 在实际设计中,硬件部分主要考虑信号的隔离,驱动电路,电池欠压保护和电路过流保护(包括主电路和电机电路)等;
Research of Medium and Low Voltage Capacitor Group Protection Based on DSP 基于DSP的中低压电容器组保护算法的研究
Elementary introduction to problem of low voltage protection of underground mine 井下低压保护问题初探
A Novel Low-Voltage Leakage Protection 一种新颖的低压漏电保护装置
In this paper, the significance and area of low voltage grounding protection are described and some methods for measuring grounding resistance are introduced. 简述了低压用电设备保护接地的意义,保护接地范围,以及测量接地电阻的方法。
Over current protection, negative current protection, zero sequence current protection, over time of start protection and low voltage protection is configured in the device. 本装置配有过流保护、负序电流保护、零序电路保护、起动时间过长保护、低电压保护。
When voltage is very low or power supply has been broken off, it will result in action of low voltage protection device so as to remove load. 在电力系统电压严重降低或电源短时小断时,往往引起低电压保护动作而甩负荷。
Introduces the constitutes of low voltage protection system of distributing transformer, analyzes the failure reason, puts forward concrete measures of improving low voltage protective reliability. 介绍了配电变压器低压保护的组成,对故障原因进行了分析,提出了提高低压保护可靠性的具体措施。
The thesis mainly makes the research on middle and low voltage microcomputer protection and measurement device based on embedded ethernet communication technology. 本论文主要就基于嵌入式以太网通信技术的中低压微机保护测控装置的设计及相关的网络通信技术展开探讨和研究。
Low voltage protection devices in China have characters of fixed time-lag. 我国的电动机低电压保护一直采用定时限特性。
Situation of Developing and Measure of Low Voltage Surge Protection Device 低压避雷电器发展现状与措施
Analysis and Improving Proposal for the Malfunction of 3rd Harmonic Filter Low Voltage Capacitor Protection at Longquan Converter Station 龙泉换流站谐波滤波器保护误动分析和改进建议
Thus, low voltage protection devices, served as lock-out protection reserve will also have characters uf inverse time-lag. 因此,作为失步保护后备的低电压保护也应具有反时限特性。
The malfunction phenomenon of the low voltage capacitor component protection of the 3rd harmonic filter at the AC site of a HVDC station during the first energizing test is analyzed and the operating current is calculated according to the measured components parameters. 针对龙泉换流站3次交流滤波器在初次充电试验中因为低压元件保护动作跳闸的现象,分析了低压元件保护的基本原理,并根据现场测量的元件参数,计算了保护动作电流的大小。
Margin of Stability and Low Voltage Protection Device of Synchronous Motor 同步电机的稳定界限和低电压保护装置
The main points need to be paid attention in the system running and maintenance were pointed out including the correct maintenance of the storage battery, the correct opening and closing order, the removing of the frequency converter low voltage protection. 并指出了该系统在运行维护中需要注意的重点,包括蓄电池的正确维护,合断开关的正确顺序,摘除变频器的低电压保护。
The sensitivity of the low-voltage overcurrent protection is limited due to the little voltage drop in case of a few turn turn-to-turn fault. 低压过流保护的灵敏度不高是由于少匝数匝间短路时变压器电压下降很少。
According to the analysis of the insufficiency of low voltage electrical network leakage protection system of mine presently, the new selective leakage protection mothod based on power line communication was proposed, and the composition and principle of the installment was introduced in detail. 分析了目前矿井低压电网漏电保护系统存在的不足,提出了基于电力载波通信的新型选择性漏电保护实现方案,介绍了装置的组成和工作原理。
In the meantime, the new control strategy can make this system to have definite ability to ride through low voltage without adopting any protection measures and offers an optimal choice for converter control of direct drive wind generation system under grid faults. 同时,新型控制策略在没有采用任何保护措施的情况下,也可使系统具有一定的低电压穿越能力,为电网故障下直驱风电系统变流器的控制提供了一种最优的选择。
Experiment result shows that the designed device has achieved anticipative target. And the development of a new, advanced low voltage distributed power line protection device is well completed. 实验结果说明本课题设计的低压配电线路微机保护及测控装置达到了给定的技术指标,已经完成研制开发一种全新的低压配电线路微机保护及测控装置的任务。
Power integrated circuits integrate low voltage control circuits, protection circuits and high voltage power MOS. In this way, the performance and stability of the systems are greatly improved and the cost can be reduced at the same time. 功率集成电路将低压控制电路、保护电路和高压功率MOS器件集成在一起,显著提高了整机的集成度和稳定性,降低了成本。
Some necessary protective measures with artificial intelligence for PV water pumping systems are developed and realized, including dry operation identification, low speed, over load, low voltage operation and lightning protection etc. 研究了光伏水泵系统的多种智能保护措施并予实现,其中含井水打干自动识别保护系统;低速、过载、欠压保护系统;防雷保护系统等。